Hospital in pleasant little corner (5)
I believe the answer is:
niche
'little corner' is the definition.
'niche' can be an answer for 'corner' (I've seen this before). I am unsure of the 'little' bit.
'hospital in pleasant' is the wordplay.
'hospital' becomes 'h'.
'in' means one lot of letters goes inside another.
'pleasant' becomes 'nice' ('nice' is associated in meaning with 'pleasant').
'h' put inside 'nice' is 'NICHE'.
Can you help me to learn more?
(Other definitions for niche that I've seen before include "Recess; comfy corner" , "Suitable position (in market, life etc)" , "good spot!" , "Suitable spot" , "Recess - alcove" .)